L86-M33 no more position

Hi,
Two days ago, I had signal from the GPS serial port.
Now I’m unable to see a position! The position frames are empty (with correct CRC).
I changed the module for a new one but the same problem persists.
I also saw that the army was conducting jamming tests, which might be the cause.
Interestingly, my phone doesn’t have any trouble finding the position using apps like GPSTest and GPS Data.
I can set, for example, GGA, RMC, and VTG and look at the frames with a logic analyzer, but I can’t read any valid position.

Thanks for help

Strange.
I removed GLONAS and it works perfectly now…